Remembering the life and career of Carrie Fisher

"We're not enlightened. There's nothing about this that is enlightening," he said.

"I would tell you, from my perspective that there's certainly no news that Carrie did drugs."

Fisher was open about her regular drug use, including those prescribed by doctors to treat her mental health conditions.

Fisher's mother, Debbie Reynolds, died of a stroke the day after her daughter's death. The two are seen with Fisher's daughter, Billie Lourd, at the Screen Actors Guild Awards in 2015. (Ethan Miller/Getty Images)

The actress, who was bipolar, experimented with drugs at a young age. At 13, she smoked pot and was using LSD by 21.

Her bipolar disorder was treated with electroshock therapy and medication.

"I am not shocked that part of her health was affected by drugs," her brother said.

The actress (seen in the 1983's "Return of the Jedi") was best known for playing Princess Leia in the "Star Wars" films. (xxxxxx)

Todd Fisher thinks that a combination of factors — and behaviors — including her smoking habit, killed his sister.

"If you want to know what killed her, it's all of it," he said.

Fisher is best known for playing Princess Leia in the "Star Wars" series. Her first film role was opposite Warren Beatty in the 1975 hit "Shampoo."

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She also appeared in "Austin Powers," "The Blues Brothers," "Charlie's Angels," "Hanna and her Sisters" and other films.